Mikuni Bs26 Carburetor Manual Verified

Hold the carburetor body at roughly a 60-degree angle. The float tab should just touch the spring-loaded pin of the needle valve without compressing it.

The BS26 is a slide-type carburetor where a diaphragm, reacting to vacuum pressure, lifts the slide and needle. Controls fuel from idle to 1/4 throttle. Needle/Needle Jet: Controls fuel from 1/4 to 3/4 throttle. Main Jet: Controls fuel from 3/4 to full throttle. mikuni bs26 carburetor manual verified

Located at the top of the carburetor. It reacts to engine vacuum. Hold the carburetor body at roughly a 60-degree angle

Understanding the internal anatomy of the Mikuni BS26 is critical during disassembly. The carburetor consists of three main sub-assemblies: the top cap cover, the main body housing, and the lower float bowl. The Top Vacuum Chamber Controls fuel from idle to 1/4 throttle

Push the small pin retaining the float hinge out with a needle or punch. Lift the float out along with the dangling needle valve.

Start the engine and let it reach operating temperature. Adjust the idle speed screw (usually a larger plastic screw) to around 1,300–1,500 RPM.

Remove all rubber O-rings, gaskets, and plastic pieces. Carburetor cleaner will destroy these components.